LibWeb: Stub MediaCapabilities IDL interface

Author: https://github.com/jamierocks
Commit: 4c5a176354
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1283
Reviewed-by: https://github.com/tcl3 ✅

Userland/Libraries/LibWeb/MediaCapabilitiesAPI/MediaCapabilities.cpp

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/Bindings/MediaCapabilitiesPrototype.h>
+#include <LibWeb/HTML/Window.h>
+#include <LibWeb/MediaCapabilitiesAPI/MediaCapabilities.h>
+
+namespace Web::MediaCapabilitiesAPI {
+
+JS_DEFINE_ALLOCATOR(MediaCapabilities);
+
+JS::NonnullGCPtr<MediaCapabilities> MediaCapabilities::create(JS::Realm& realm)
+{
+    return realm.heap().allocate<MediaCapabilities>(realm, realm);
+}
+
+MediaCapabilities::MediaCapabilities(JS::Realm& realm)
+    : PlatformObject(realm)
+{
+}
+
+void MediaCapabilities::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(MediaCapabilities);
+}
+
+}

Userland/Libraries/LibWeb/MediaCapabilitiesAPI/MediaCapabilities.h

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+/*
+ * Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/Bindings/PlatformObject.h>
+
+namespace Web::MediaCapabilitiesAPI {
+
+class MediaCapabilities final : public Bindings::PlatformObject {
+    WEB_PLATFORM_OBJECT(MediaCapabilities, Bindings::PlatformObject);
+    JS_DECLARE_ALLOCATOR(MediaCapabilities);
+
+public:
+    static JS::NonnullGCPtr<MediaCapabilities> create(JS::Realm&);
+    virtual ~MediaCapabilities() override = default;
+
+private:
+    MediaCapabilities(JS::Realm&);
+
+    virtual void initialize(JS::Realm&) override;
+};
+
+}

Userland/Libraries/LibWeb/MediaCapabilitiesAPI/MediaCapabilities.idl

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+// https://w3c.github.io/media-capabilities/#mediacapabilities
+[Exposed=(Window, Worker)]
+interface MediaCapabilities {
+    [FIXME, NewObject] Promise<MediaCapabilitiesDecodingInfo> decodingInfo(MediaDecodingConfiguration configuration);
+    [FIXME, NewObject] Promise<MediaCapabilitiesEncodingInfo> encodingInfo(MediaEncodingConfiguration configuration);
+};